LOOM-2045: Revert @typescript-eslint/eslint-plugin & @typescript-eslint/parser v8 back to v7

[jronald01]

https://skyscanner.atlassian.net/browse/LOOM-2045

https://skyscanner.slack.com/archives/C01B5E264RM/p1738921081606849

This update resulted in many false positives for the @typescript-eslint/array-type rule.

The same errors do not show up in the typescript-eslint playground, but that playground uses eslint v9 while we still use v8: https://typescript-eslint.io/play

Reverting until it can be debugged further.

const CABIN_CLASS: Array<[string, string]> = [
  [ECONOMY, ECONOMY_PROTO],
  [PREMIUM_ECONOMY, PREMIUM_ECONOMY_PROTO],
  [BUSINESS, BUSINESS_PROTO],
  [FIRST, FIRST_PROTO],
];

Array type using 'Array<any>' is forbidden for simple types. Use 'any[]' instead  @typescript-eslint/array-type