fix: fix various type issues

[ephys]

This PR fixes the following issues:

• Fix queryGenerator selectQuery tableName typing
• Fix queryInterface increment & decrement parameter order & typing
• Restrict snowflake's JSON escape method param type
• Fix typing of findByPk to accept any PK type
• Use Object.create(null) instead of {} in a few places

This PR also imports misc refactors from PR #15598:

• Rename SequelizeMethod -> BaseSqlExpression & split expression builders into their own individual files to prevent circular import issues
• Move the functions that instantiate these expressions next to their classes (i.e. Fn & fn are in the same file)
• Re-add rejectOnEmpty in belongs-to-many which was accidentally removed in fix: small tweaks to associations and decorators #15763
• Move where-related utils to utils/where.ts
• Add & use an immutable constant EMPTY_OBJECT instead of creating new objects for small perf optimization
• Add internal utils used by feat: rewrite the part of QueryGenerator responsible for WHERE #15598
• Safeguard quoteIdentifier

[WikiRik]

Thanks for this PR! This already reduces the big PR with ~7%. Just three small questions and a suggestion but no blocking things for merging