feat: Remove `send_reliable_submission`

[JST5000]

High Level Overview of Change

Title says it all.

Context of Change

submit_and_wait now does everything send_reliable_submission does and more - so we want people to migrate to the new version which is receiving all our support.

Type of Change

• [X] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Test Plan

CI Passes (I migrated over the tests which were only for send_reliable_submission to apply to submit_and_wait to keep that coverage)

• Add a link to the submit_and_wait reference docs in the README once that becomes public.

[JST5000]

Some of the snippets need to be fixed - they have an incorrect param order for submit_and_wait

Good catch - I thought I caught them all but the set_regular_key one had an incorrect order.