src: refactor compression allocation tracking, enable for zstd

[addaleax]

src: release memory for zstd contexts in Close()

This aligns zstd streams with other compression libraries in this regard,
and enables releasing memory early when the stream ends in JS instead of
waiting for GC to clean up the wrapper object (which is a problem that
is exacerbated in the zstd context because we do not track memory
and report memory pressure to V8 yet).

src: extract zlib allocation tracking into its own class

This makes it a bit easier to separate concerns, and results in
reduced code duplication when compiling since this code does not
depend on template parameters.

src: do not store compression methods on Brotli classes

This addresses a long-standing TODO comment, referencing the fact
that these values are either known at compile time or can be
inferred from the this value in the context class.

src: track allocations made by zstd streams

This is both valuable as a diagnostic tool and as a way to inform
the JS runtime about external allocations.

Currently, this is a feature only enabled in the statically linked
builds of zstd, so with --shared-zstd, we fall back to the
non-tracking variant.

[nodejs-github-bot]

Review requested:

• @nodejs/gyp

[codecov]

Codecov Report

❌ Patch coverage is 92.64706% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.72%. Comparing base (3ab9dd8) to head (5110ea4).

Files with missing lines	Patch %	Lines
src/node_zlib.cc	92.64%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61717      +/-   ##
==========================================
- Coverage   89.73%   89.72%   -0.01%     
==========================================
  Files         675      675              
  Lines      204502   204516      +14     
  Branches    39304    39303       -1     
==========================================
+ Hits       183502   183510       +8     
- Misses      13283    13292       +9     
+ Partials     7717     7714       -3     

Files with missing lines	Coverage Δ
src/node_zlib.cc	78.43% <92.64%> (+0.47%)	⬆️

... and 30 files with indirect coverage changes

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