Remove ESMF_HAS_ACHAR_BUG CMake and cpp macro, update to ESMA_cmake v3.37.0

[mathomp4]

Description

This PR removes the ESMF_HAS_ACHAR_BUG CMake option and CPP macro that was used as a workaround for a NAG + ESMF bug. Testing by @metdyn and myself shows that this is no longer needed with ESMF 8.6.0.

It also updates to ESMA_cmake v3.37.0 which sets the ESMF_HAS_ACHAR_BUG to default OFF for now and will be removed in a later release.

Related Issue

Motivation and Context

Let's NAG run ExtDataDriver.x!

How Has This Been Tested?

NAG only seems to run the tests correctly without this, so we turn it off. If we don't run NAG, we never use this, so it doesn't affect other compilers.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Trivial change (affects only documentation or cleanup)

Checklist:

• I have tested this change with a run of GEOSgcm (if non-trivial)
• I have added one of the required labels (0 diff, 0 diff trivial, 0 diff structural, non 0-diff)
• I have updated the CHANGELOG.md accordingly following the style of Keep a Changelog