Fix microbatch behavior flag check

[QMalcolm]

resolves #349

Problem

Previously we were adding microbatch to the list of builtin_incremental_strategies only when the behavior flag require_batched_execution_for_custom_microbatch_strategy was set to True. However in reality, we only want to set it True when that flag evaluates to False. This is because having the flag set to True implies by the transitive property that the project has a custom microbatch macro defined. In this situation, we don't want microbatch to be in the list of builtins because if the adapter doesn't have a builtin microbatch macro, things will break. Said another way, the only time that having microbatch in the list of builtin incremental strategies is relevant is when the flag is False.

Solution

Only add microbatch to the list of builtin_incremental_strategies when the behavior flag require_batched_execution_for_custom_microbatch_strategy is False

Checklist

• [X] I have read the contributing guide and understand what's expected of me
• [X] I have run this code in development, and it appears to resolve the stated issue
• [X] This PR includes tests, or tests are not required/relevant for this PR
• [X] This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc.) or this PR has already received feedback and approval from Product or DX