feat: add support to filter by `Instant`, `ZonedDateTime`, `OffsetDateTime`, ... in LINQ

[Sylvain2703]

Proposed Changes

Features

• Add nanosecond precision support to the DateTimeLiteral AST type (thanks to NodaTime's Instant).
• Add support in LINQ queries for:
  • NodaTime's Instant, ZonedDateTime, OffsetDateTime, OffsetDate, LocalDateTime and LocalDate,
  • .NET 6+ DateOnly (adding net6.0 to InfluxDB.Client.Linq's TargetFrameworks),
  • NodaTime's Duration and Period,
  • Tick precision for TimeSpan (only microsecond precision was supported),
  • Unsigned integers, sbyte, short and decimal.

Refactor

• Use pattern matching when creating AST Expression (in VariableAggregator.CreateExpression()).
• Remove a useless function call for DateTime conversion (in FluxRecord.GetTimeInDateTime()).

Tests

• Add tests to cover new supported types and adjust existing ones for TimeSpan precision.

Checklist

• [ ] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [ ] dotnet test completes successfully
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)