feat: update inch options and url to support influxdb 3 core

[philjb]

Adds an option to use the v3 native write endpoint so advanced control of write behavior can be used such as the "no-sync" option.

Additionally, modifies the channel for buffered write batches to reflect concurrency setting, fixes an issue with retrying a write that was needlessly recompressing or copying the write batch, reduced allocations and copies by reusing buffers and letting bytes Buffer's take ownership of existing buffers.

Updates golang to version 1.21

• closes #46