Wrap report sections in details

[lboeman]

• [x] I am familiar with the contributing guidelines.
• [x] Tests added.
• [x] Adds descriptions to appropriate "what's new" file in docs/source/whatsnew for all changes. Includes link to the GitHub Issue with :issue:`num` or this Pull Request with :pull:`num`. Includes contributor name and/or GitHub username (link with :ghuser:`user`).
• [x] Maintainer: Appropriate GitHub Labels and Milestone are assigned to the Pull Request and linked Issue.

Puts many parts of reports into expandable sections to improve readability. Screenshot of full report is attached for review. Will need to ensure pdfs render correctly.

[wholmgren]

The pdf reports do compile and they look fine.

Some of the pdf_* files appear to be exactly the same as the original versions:

• pdf_data_resampling_postamble
• pdf_version_description
• maybe more

Can we put the <details>/<summary> and closing tags in the body.html file instead? e.g.

{% block dataresampleandalign %}
<details id="preprocessing-procedure" open="">
  <summary>
    <h4>Preprocessing procedure</h4>
  </summary>
{% include "data_resampling_preamble" %}
</details>
{% endblock %}

Not a big deal and not sure if it was created by this PR, but there's inconsistent capitalization in pdf tables:

[lboeman]

Some of the pdf_* files appear to be exactly the same as the original versions:

* pdf_data_resampling_postamble

* pdf_version_description

* maybe more

While I think that having two sets of text files is harder to maintain, I feel like using some prefixed and some non-prefixed text blocks in the pdf template is also an easy way to introduce bugs to the pdf in the future. Happy to remove the duplicates if you don't agree, but that was my thought process here.

[lboeman]

Can we put the <details>/<summary> and closing tags in the body.html file instead?

Moved these, and had to separate out the nested "Data validation procedure" text from data_validation_pre_text

Not a big deal and not sure if it was created by this PR, but there's inconsistent capitalization in pdf tables:

This should be fixed now. Added lower calls to the pdf macros.