feat(instrumentation-dns): allow ignoreHostnames to be only a single IgnoreMatcher

[10xLaCroixDrinker]

Short description of the changes

This PR updates the ignoreHostnames option of @opentelemetry/instrumentation-dns to allow a single IgnoreMatcher rather than just an array of IgnoreMatcher.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: pichlermarc / name: Marc Pichler (d889c87)
• ✅ login: 10xLaCroixDrinker / name: Jamie King (97afbe6, 98d624c)

[blumamir]

Thanks @10xLaCroixDrinker LGTM

Please sign the CLA so we can merge this PR

[codecov]

Codecov Report

Merging #1929 (97afbe6) into main (d0fc194) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 97afbe6 differs from pull request most recent head d889c87. Consider uploading reports for the commit d889c87 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1929   +/-   ##
=======================================
  Coverage   91.00%   91.00%           
=======================================
  Files         146      146           
  Lines        7491     7493    +2     
  Branches     1502     1503    +1     
=======================================
+ Hits         6817     6819    +2     
  Misses        674      674           

Files	Coverage Δ
...ode/opentelemetry-instrumentation-dns/src/utils.ts	100.00% <100.00%> (ø)

[10xLaCroixDrinker]

That's resolved now @blumamir