psa: Ensure spaces before partition name comment

[Patater]

Summary of changes

The psa_setup.c.tpl jinja template would strip whitespace from before
the partition name comment when inserting non-test partition database
entries. Fix the template to generate psa_setup.c with the partition
name comment properly indented.

This will help avoid weird changes to psa_setup.c that cause it to fail AStyle checks when running release.py.

Documentation

None

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Pull request type

[X] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[] Covered by existing mbed-os tests (Greentea or Unittest)
[X] Tests / results supplied as part of this PR

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Reviewers

@jainvikas8

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[jainvikas8]

This actually fixes - #12084

[ciarmcom]

@Patater, thank you for your changes.
@jainvikas8 @ARMmbed/mbed-os-tools @ARMmbed/mbed-os-maintainers please review.

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts