UI adjustments in PDF copy

[andreia-ferreira]

Towards #3823

This PR adds the following adjustments to the PDF text:

• Add 'Date' label to the header
• Move Job section from the header to the report, above the table, and add the Submission details to the header instead
• Make the submission above the table larger and bold

@shobhitagarwal1612 PTAL?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.71%. Comparing base (69bef48) to head (bc944ce).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3861      +/-   ##
============================================
+ Coverage     67.63%   67.71%   +0.07%     
- Complexity     1858     1859       +1     
============================================
  Files           411      411              
  Lines         10834    10860      +26     
  Branches       1426     1425       -1     
============================================
+ Hits           7328     7354      +26     
- Misses         2767     2768       +1     
+ Partials        739      738       -1     

Files with missing lines	Coverage Δ
...groundplatform/feature/pdf/render/PdfTextPaints.kt	100.00% <100.00%> (ø)
...org/groundplatform/feature/pdf/render/PdfWriter.kt	98.23% <100.00%> (+0.12%)	⬆️
...oundplatform/feature/pdf/mapper/LoiReportMapper.kt	93.24% <100.00%> (+1.81%)	⬆️
...latform/feature/pdf/model/SubmissionPdfDocument.kt	93.93% <100.00%> (+1.34%)	⬆️
...org/groundplatform/feature/pdf/render/PdfConfig.kt	100.00% <ø> (ø)
...form/feature/pdf/render/layout/PageHeaderLayout.kt	100.00% <100.00%> (ø)
...dplatform/feature/pdf/render/layout/TableLayout.kt	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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