Remove apply_library_patches

[bolasim]

🚀 What

We used to have this mechanism to patch code to be faster for byte range downloads. this is likely unintended behavior from the user point of few so we should drop it.
Folks who REALLY need this can pin old truss versions, but we will not do this going forward.

Changes:

• Drop and warn on legacy key in TrussConfig (ignored with warning).
• Remove spec accessor and runtime usage.
• Delete templates/server/common/patches.py and patches directory.
• Update tests: remove toggle test, add warning/ignore test; fix fixtures.

Migration:

• If configs contain apply_library_patches, it is ignored and a warning is logged. Remove it from your config to silence the warning." --base main --head bola/remove-apply-library-patches --fill