Add text translate util

[bangbay-bluetiger]

Description

• Add a translate util that replaces any keys in {{key}} format within a string with defined values
• Use the util in ExportedReportPage with a LaunchDarkly flag
• Remove old LD flags in tests

Related ticket(s)

CMDCT-3677

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How to test

1. Create a WP and SAR.
2. Verify the headings are as expected.
3. Unit tests also provide coverage.

Notes

If we like this pattern, there are several other components where we can use the util.

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Pre-review checklist

• I have added thorough tests, if necessary
• I have updated relevant documentation, if necessary
• I have performed a self-review of my code
• I have manually tested this PR in the deployed cloud environment

[codeclimate]

Code Climate has analyzed commit f943f46 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (90% is the threshold).

This pull request will bring the total coverage in the repository to 93.2% (0.1% change).

View more on Code Climate.

[gmrabian]

Changes look good to me. I'm curious to see the other use cases you have in mind. Is the advantage just of defining the desired string in a verbiage or json file rather than in the components?

[bangbay-bluetiger]

Changes look good to me. I'm curious to see the other use cases you have in mind. Is the advantage just of defining the desired string in a verbiage or json file rather than in the components?

Yes, defining the strings in verbiage files makes it easier to find them. Plus, instead of using string fragments where it isn't obvious they're being combined later, it's easier to see the complete string.

[britt-mo]

Looked good in the browser. I like this change, looks cleaner than using string interpolation in the component.