Make array metadata mandatory

[gatesn]

As part of #4492 - makes array metadata mandatory.

Next step is to rename EncodeVTable to EncodingVTable, and move SerdeVTable::build to EncodingVTable (in effect, making serde mandatory)

[codspeed-hq]

CodSpeed Performance Report

Merging #5014 will not alter performance

_{Comparing ngates/mandatory-metadata (5c22581) with develop (5348219)}

Summary

✅ 1309 untouched

[codecov]

Codecov Report

❌ Patch coverage is 77.29469% with 47 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.29%. Comparing base (5348219) to head (5c22581).
⚠️ Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
encodings/alp/src/alp_rd/serde.rs	0.00%	15 Missing ⚠️
vortex-array/src/arrays/list/vtable/visitor.rs	0.00%	6 Missing ⚠️
encodings/bytebool/src/serde.rs	0.00%	4 Missing ⚠️
encodings/zigzag/src/serde.rs	0.00%	4 Missing ⚠️
vortex-array/src/arrays/null/mod.rs	0.00%	4 Missing ⚠️
vortex-array/src/arrays/chunked/vtable/visitor.rs	0.00%	3 Missing ⚠️
vortex-array/src/arrow/array.rs	0.00%	3 Missing ⚠️
vortex-array/src/patches.rs	60.00%	2 Missing ⚠️
encodings/pco/src/serde.rs	80.00%	1 Missing ⚠️
encodings/sparse/src/serde.rs	83.33%	1 Missing ⚠️
... and 4 more

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