Add ubiquitously-called internal functions to NAMESPACE

[MichaelChirico]

Split off from #2030 for clarity.

These calls are used so much it's odd we wouldn't put them in the NAMESPACE. After that, it's redundant IMO to always namespace-qualify them.

[AshesITR]

There are some stray diffs in .Rd files here.

[codecov-commenter]

Codecov Report

Merging #2031 (c35bb57) into main (4e4183f) will increase coverage by 0.00%.
The diff coverage is 99.67%.

❗ Current head c35bb57 differs from pull request most recent head 14b432e. Consider uploading reports for the commit 14b432e to get more accurate results

@@           Coverage Diff           @@
##             main    #2031   +/-   ##
=======================================
  Coverage   98.56%   98.56%           
=======================================
  Files         114      114           
  Lines        5008     5017    +9     
=======================================
+ Hits         4936     4945    +9     
  Misses         72       72           

Files Changed	Coverage Δ
R/utils.R	98.29% <90.90%> (ø)
R/T_and_F_symbol_linter.R	100.00% <100.00%> (ø)
R/any_duplicated_linter.R	100.00% <100.00%> (ø)
R/any_is_na_linter.R	100.00% <100.00%> (ø)
R/assignment_linter.R	100.00% <100.00%> (ø)
R/backport_linter.R	100.00% <100.00%> (ø)
R/boolean_arithmetic_linter.R	100.00% <100.00%> (ø)
R/brace_linter.R	100.00% <100.00%> (ø)
R/class_equals_linter.R	100.00% <100.00%> (ø)
R/commas_linter.R	100.00% <100.00%> (ø)
... and 79 more

[AshesITR]

I've checked all changes. LGTM except for the unnecessary namespace imports.