test: use heapdump test for SecureContext memory tracking

[mertcanaltin]

Replace cctest with a heap snapshot test for SecureContext memory tracking.

Refs: #59051

@joyeecheung #59051 (comment)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.80%. Comparing base (726b220) to head (9fcc36d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62689      +/-   ##
==========================================
- Coverage   89.81%   89.80%   -0.02%     
==========================================
  Files         699      699              
  Lines      216331   216331              
  Branches    41355    41361       +6     
==========================================
- Hits       194294   194269      -25     
+ Misses      14156    14144      -12     
- Partials     7881     7918      +37     

see 48 files with indirect coverage changes

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[joyeecheung]

This creates two snapshots, I think you can just merge the two into one call.