perf(tooltip): Simplify rendering when tooltip is not visible

[jurokapsiar]

Based on the perf measurements, I found out that adding tooltips to the toolbar items has significant perf impact (~20% on my machine). This PR simplifies the rendering if the tooltip is not visible (it has to be in the DOM for accessibility purposes). The change seems to get back half of the degradation, see the perf measurements below.

Added CustomToolbar.perf.tsx to do the measurements.

Before:

Example	Avg	Avg diff	Avg Normalized	Avg Normalized diff	Median	Median diff	Median Normalized	Median Normalized diff
CustomToolbar.perf.tsx	119.07	119.07	63.41	63.41	108.14	108.14	60.48	60.48

After:

Example	Avg	Avg diff	Avg Normalized	Avg Normalized diff	Median	Median diff	Median Normalized	Median Normalized diff
CustomToolbar.perf.tsx	97.46	97.46	52.73	52.73	88.64	88.64	50.2	50.2

[codecov]

Codecov Report

Merging #1981 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1981   +/-   ##
=======================================
  Coverage   77.01%   77.01%           
=======================================
  Files         158      158           
  Lines        5456     5456           
  Branches     1578     1578           
=======================================
  Hits         4202     4202           
  Misses       1241     1241           
  Partials       13       13

Impacted Files	Coverage Δ
packages/react/src/components/Tooltip/Tooltip.tsx	62.5% <ø> (ø)	⬆️
...es/react/src/components/Tooltip/TooltipContent.tsx	100% <100%> (ø)	⬆️

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