Remove usage of long-deprecated CARGO_BIN_PATH

[CraftSpider]

Changes to use the better-supported CARGO_BIN_EXE_<name>

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 29.54%. Comparing base (cafcb17) to head (6c1d2f1).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1369   +/-   ##
=======================================
  Coverage   29.54%   29.54%           
=======================================
  Files         273      273           
  Lines      180506   180506           
  Branches   180506   180506           
=======================================
  Hits        53327    53327           
  Misses      55476    55476           
  Partials    71703    71703           

Components	Coverage Δ
tectonic	51.40% <ø> (ø)
bridge_core	34.16% <ø> (ø)
bridge_flate	17.64% <ø> (ø)
bridge_fontconfig	96.17% <ø> (ø)
bridge_freetype2	92.70% <ø> (ø)
bridge_graphite2	42.47% <ø> (ø)
bridge_harfbuzz	82.83% <ø> (ø)
bridge_icu	∅ <ø> (∅)
bridge_png	100.00% <ø> (ø)
bundles	34.94% <ø> (ø)
cfg_support	94.84% <ø> (ø)
dep_support	0.00% <ø> (ø)
docmodel	84.61% <ø> (ø)
engine_bibtex	66.45% <ø> (ø)
engine_spx2html	0.00% <ø> (ø)
engine_xdvipdfmx	64.30% <ø> (ø)
engine_xetex	35.27% <ø> (ø)
errors	47.61% <ø> (ø)
geturl	28.20% <ø> (ø)
io_base	76.11% <ø> (ø)
pdf_io	14.19% <ø> (ø)
status_base	74.69% <ø> (ø)
xdv	55.28% <ø> (ø)
xetex_format	23.31% <ø> (ø)
xetex_layout	56.82% <ø> (ø)

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[CraftSpider]

CI failures are pre-existing, merging as-is and will fix them later