port: fix dumpkeyset (#4176)

[Jason-W123]

Disable chunked-store in datool dumpkeyset so it no longer requires a signer and can compute keyset hashes directly from configured backends.
If we don't disable it, this command will throw error panic: chunked store requires a valid signer for replay protection; cannot use nil signer

[github-actions]

❌ 4 Tests Failed:

Tests completed	Failed	Passed	Skipped
2171	4	2167	0

View the top 3 failed tests by shortest run time

TestOutOfGasInStorageCacheFlush

Stack Traces | 10.160s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
=== CONT  TestOutOfGasInStorageCacheFlush
ERROR[12-30|00:08:46.555] Dangling trie nodes after full cleanup
    program_test.go:2813: goroutine 689637 [running]:
        runtime/debug.Stack()
        	/opt/hostedtoolcache/go/1.25.5/x64/src/runtime/debug/stack.go:26 +0x5e
        github.com/offchainlabs/nitro/util/testhelpers.RequireImpl({0x40c31d0, 0xc01995a8c0}, {0x40806c0, 0xc0bd23fc00}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/util/testhelpers/testhelpers.go:29 +0x55
        github.com/offchainlabs/nitro/system_tests.Require(0xc01995a8c0, {0x40806c0, 0xc0bd23fc00}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/system_tests/common_test.go:1790 +0x5d
        github.com/offchainlabs/nitro/system_tests.TestOutOfGasInStorageCacheFlush(0xc01995a8c0)
        	/home/runner/work/nitro/nitro/system_tests/program_test.go:2813 +0xfe6
        testing.tRunner(0xc01995a8c0, 0x3d08ef0)
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1934 +0xea
        created by testing.(*T).Run in goroutine 1
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1997 +0x465
        
    program_test.go:2813: �[31;1m [] failed calculating position for validation: batch not found on L1 yet �[0;0m
INFO [12-30|00:08:56.653] HTTP server stopped                      endpoint=127.0.0.1:36219
TRACE[12-30|00:08:56.653] P2P networking is spinning down
--- FAIL: TestOutOfGasInStorageCacheFlush (10.16s)

TestVersion40

Stack Traces | 11.300s run time

... [CONTENT TRUNCATED: Keeping last 20 lines]
INFO [12-30|00:07:37.345] HTTP server stopped                      endpoint=127.0.0.1:37621
TRACE[12-30|00:07:37.348] P2P networking is spinning down
    precompile_inclusion_test.go:90: goroutine 455315 [running]:
        runtime/debug.Stack()
        	/opt/hostedtoolcache/go/1.25.5/x64/src/runtime/debug/stack.go:26 +0x5e
        github.com/offchainlabs/nitro/util/testhelpers.RequireImpl({0x40c31d0, 0xc0aa24ee00}, {0x4080b40, 0xc08eab2f60}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/util/testhelpers/testhelpers.go:29 +0x55
        github.com/offchainlabs/nitro/system_tests.Require(0xc0aa24ee00, {0x4080b40, 0xc08eab2f60}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/system_tests/common_test.go:1790 +0x5d
        github.com/offchainlabs/nitro/system_tests.testPrecompiles(0xc0aa24ee00, 0x28, {0xc09095bdf8, 0x5, 0x39?})
        	/home/runner/work/nitro/nitro/system_tests/precompile_inclusion_test.go:90 +0x371
        github.com/offchainlabs/nitro/system_tests.TestVersion40(0xc0aa24ee00?)
        	/home/runner/work/nitro/nitro/system_tests/precompile_inclusion_test.go:71 +0x64b
        testing.tRunner(0xc0aa24ee00, 0x3d093d0)
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1934 +0xea
        created by testing.(*T).Run in goroutine 1
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1997 +0x465
        
    precompile_inclusion_test.go:90: �[31;1m [] execution aborted (timeout = 5s) �[0;0m
--- FAIL: TestVersion40 (11.30s)

TestBatchPosterActuallyPostsBlobsToL1

Stack Traces | 26.730s run time

=== RUN   TestBatchPosterActuallyPostsBlobsToL1
=== PAUSE TestBatchPosterActuallyPostsBlobsToL1
=== CONT  TestBatchPosterActuallyPostsBlobsToL1
    batch_poster_test.go:884: goroutine 51 [running]:
        runtime/debug.Stack()
        	/opt/hostedtoolcache/go/1.25.5/x64/src/runtime/debug/stack.go:26 +0x5e
        github.com/offchainlabs/nitro/util/testhelpers.RequireImpl({0x40c31d0, 0xc00050ae00}, {0x4080660, 0x5e97060}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/util/testhelpers/testhelpers.go:29 +0x55
        github.com/offchainlabs/nitro/system_tests.Require(0xc00050ae00, {0x4080660, 0x5e97060}, {0x0, 0x0, 0x0})
        	/home/runner/work/nitro/nitro/system_tests/common_test.go:1790 +0x5d
        github.com/offchainlabs/nitro/system_tests.TestBatchPosterActuallyPostsBlobsToL1(0xc00050ae00)
        	/home/runner/work/nitro/nitro/system_tests/batch_poster_test.go:884 +0x388
        testing.tRunner(0xc00050ae00, 0x3d08300)
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1934 +0xea
        created by testing.(*T).Run in goroutine 1
        	/opt/hostedtoolcache/go/1.25.5/x64/src/testing/testing.go:1997 +0x465
        
    batch_poster_test.go:884: �[31;1m [] context deadline exceeded �[0;0m
--- FAIL: TestBatchPosterActuallyPostsBlobsToL1 (26.73s)

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[Jason-W123]

Reopened at #4176

[joshuacolvin0]

good to keep to backport #4176

[joshuacolvin0]

LGTM