chore: Fix CI

[steviez]

Problem

CI is currently broken. The cause appears to be "transitive" feature enablement. That is, we were previously getting the frozen-abi feature for some crates due to our dependency on solana-sdk.

Each of the below PR's individually/independently passed CI, but it appears that they cumulatively resulted in us not having frozen-abi feature for runtime and core:

• rpc: Remove unused solana-sdk dependency #6301
• core: Remove solana-sdk dependency #6302
• svm: Remove solana-sdk dependency from examples #6304
• core: Remove unused solana-sdk dev dependency #6305
• runtime: Remove dependency on solana-sdk #6308

Summary of Changes

Explicitly mark frozen-abi feature dependency and update Cargo.lock files to get CI passing again

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.8%. Comparing base (060ff07) to head (98b3330).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6329   +/-   ##
=======================================
  Coverage    82.8%    82.8%           
=======================================
  Files         846      846           
  Lines      378217   378217           
=======================================
+ Hits       313274   313291   +17     
+ Misses      64943    64926   -17     

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