Bumps [github.com/jackc/pgx/v5](https://github.com/jackc/pgx) from 5.0.0 to 5.5.4.
- [Changelog](https://github.com/jackc/pgx/blob/master/CHANGELOG.md)
- [Commits](jackc/pgx@v5.0.0...v5.5.4)

---
updated-dependencies:
- dependency-name: github.com/jackc/pgx/v5
  dependency-type: direct:production
...

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This reverts commit b7aeda1.

Modify several internal functions to avoid allocating unnecessary
memory. This commit employs three strategies:

- Allocate a scans slice only when scanning the first row, and store it
  inside the RowScanner to reuse on subsequent rows.
- When scanning into slices, use more sophistocated reflection code to
  extend the slie while avoid temporary slice header allocations.
- When scanning into slices of non-pointers, scan directly into the
  slice index, rather than allocate a new value and copy after scanning.