Add T64 and GORILLA packing transform codecs

[xiangfu0]

Context

Stacked on #19305 and part of the split of #18229.

What changed

• Adds T64, a frame-of-reference packing transform over fixed 64-value blocks.
• Adds GORILLA, an XOR/window packing transform with an MSB-first bitstream.
• Registers both frozen codec names and enforces that a packing transform is the last transform before any compression stages.
• Makes all fixed-width frame fields explicitly big-endian.
• Requires exact frame consumption: T64 rejects nonzero tail slots and trailing bytes; GORILLA rejects nonzero final padding and trailing bytes.
• Uses reusable 64-value block scratch for T64 instead of allocating a full chunk-sized long[].
• Corrects the public wire documentation for contained-window reuse and width-minus-one encoding.

Safety and scope

T64/GORILLA remain runtime-only in this slice; production forward-index creation/loading is first wired in #19307.

Verification

• INT/LONG round trips across empty, singleton, partial-block, boundary, and every supported bit width.
• Happy-path bounded decodeInto, mixed executor chains, corruption/trailing/padding rejection, and encoded-size bounds.
• Independent known-byte fixtures for T64 INT/LONG and GORILLA.
• Little-endian caller-view regressions proving big-endian persisted decoding.
• Spotless, Checkstyle, license format, and license check for pinot-segment-local.

Stack

#19284 → #19285 → #19305 → #19306 (this PR) → #19307 → #19308 → #19309

Review and merge parent-first.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 92.34568% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 67.26%. Comparing base (f40e6d4) to head (f31fb3e).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...segment/local/io/codec/GorillaCodecDefinition.java	92.48%	8 Missing and 8 partials ⚠️
...not/segment/local/io/codec/T64CodecDefinition.java	92.10%	7 Missing and 8 partials ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master   #19306       +/-   ##
=============================================
+ Coverage     39.01%   67.26%   +28.25%     
- Complexity     1423     1424        +1     
=============================================
  Files          3482     3484        +2     
  Lines        223388   223793      +405     
  Branches      35194    35289       +95     
=============================================
+ Hits          87161   150543    +63382     
+ Misses       128313    61267    -67046     
- Partials       7914    11983     +4069     

Flag	Coverage Δ
integration	100.00% <ø> (ø)
integration1	100.00% <ø> (ø)
integration2	0.00% <ø> (?)
java-25	67.26% <92.34%> (+28.25%)	⬆️
lane-a	100.00% <ø> (ø)
lane-b	0.00% <ø> (ø)
temurin	67.26% <92.34%> (+28.25%)	⬆️
unittests	67.26% <92.34%> (+28.25%)	⬆️
unittests1	57.49% <0.00%> (?)
unittests2	39.12% <92.34%> (+0.10%)	⬆️

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