Wrap calls from ebpf_drv.c in epoch calls

[Alan-Jowett]

Description

Ensure that all calls from ebpf_drv.c are to API's that call epoch enter/exit as appropriate.
Replace dynamically sized thread entry table with fixed capacity thread entry table with block on full semantics.

Resolves: #2164
Resolves: #2165

Testing

CI/CD

Documentation

No.

[codecov]

Codecov Report

Merging #2189 (b340eca) into main (caa0528) will decrease coverage by 1.69%.
The diff coverage is 87.06%.

@@            Coverage Diff             @@
##             main    #2189      +/-   ##
==========================================
- Coverage   83.59%   81.90%   -1.69%     
==========================================
  Files         151      143       -8     
  Lines       28217    26669    -1548     
==========================================
- Hits        23587    21843    -1744     
- Misses       4630     4826     +196     

Impacted Files	Coverage Δ
libs/execution_context/ebpf_core.c	88.73% <50.00%> (-3.43%)	⬇️
libs/execution_context/ebpf_program.c	77.40% <50.00%> (-5.34%)	⬇️
libs/platform/user/ebpf_platform_user.cpp	80.77% <78.26%> (-2.65%)	⬇️
libs/platform/ebpf_epoch.c	89.41% <96.00%> (-2.11%)	⬇️
libs/execution_context/ebpf_link.c	90.64% <100.00%> (-1.07%)	⬇️
libs/platform/ebpf_state.c	83.82% <100.00%> (-7.36%)	⬇️
libs/platform/unit/platform_unit_test.cpp	97.70% <100.00%> (-1.31%)	⬇️
tests/end_to_end/end_to_end.cpp	97.64% <100.00%> (-0.06%)	⬇️

... and 59 files with indirect coverage changes

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[dthaler]

analysis failure:

         D:\a\ebpf-for-windows\ebpf-for-windows\libs\platform\ebpf_epoch.c(422): error C28167: The function 'ebpf_epoch_enter_no_failure' changes the IRQL and does not restore the IRQL before it exits. It should be annotated to reflect the change or the IRQL should be restored. IRQL was last set to 2 at line 424. [D:\a\ebpf-for-windows\ebpf-for-windows\libs\platform\kernel\platform_kernel.vcxproj]
         D:\a\ebpf-for-windows\ebpf-for-windows\libs\platform\ebpf_epoch.c(434): error C28167: The function 'ebpf_epoch_exit_no_failure' changes the IRQL and does not restore the IRQL before it exits. It should be annotated to reflect the change or the IRQL should be restored. IRQL was last set at line 437. [D:\a\ebpf-for-windows\ebpf-for-windows\libs\platform\kernel\platform_kernel.vcxproj]

[Alan-Jowett]

Blocked on #2191

[Alan-Jowett]

No longer blocked on #2191

[shankarseal]

Either add a more detailed description of the changes or at least update top level comments in the epoch module.

[Alan-Jowett]

Switching to draft while I evaluate @shankarseal proposal.