bpf_loader: remove ExtendProgramChecked instruction

[buffalojoec]

Problem

SIMD-0164 was closed and never landed. Therefore the ExtendProgramChecked instruction should not exist.

Summary of Changes

Remove it from the Loader V3 program as well as the CLI.

[mergify]

The Firedancer team maintains a line-for-line reimplementation of the
native programs, and until native programs are moved to BPF, those
implementations must exactly match their Agave counterparts.
If this PR represents a change to a native program implementation (not
tests), please include a reviewer from the Firedancer team. And please
keep refactors to a minimum.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 23.07692% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.2%. Comparing base (ed322a9) to head (0c44852).

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #11685    +/-   ##
========================================
  Coverage    83.1%    83.2%            
========================================
  Files         860      860            
  Lines      321462   321349   -113     
========================================
- Hits       267408   267368    -40     
+ Misses      54054    53981    -73     

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[Lichtso]

Think it is small enough to land in one go.

[buffalojoec]

Think it is small enough to land in one go.

Actually let me break it up, because I decided to keep the test module and already broke off the CLI bit: #11764

[buffalojoec]

@Lichtso this PR is now based on #11764. If you still think it's good to land as-is, I'll just merge this and close #11764.

Signal with approval. 😄