Fix zoom in/out display issues in plots for high precision (especially timestamps) x axis data.

[shefalijoshi]

Closes #7926

Describe your changes:

WebGL's graphics buffers are limited to single-precision floating-point numbers (Float32Array), which lose numerical accuracy when dealing with large absolute timestamps.
Previously, we used the first point of the telemetry endpoint as the initial data ‘anchor’ point. This caused the offsets to be very large that did not fit into a 32-bit float.
We now use the minimum x value of the current viewport as the ‘anchor’ point. This remains static across frames and only steps forward in clean blocks if the user scrolls an entire page width away, or zooms significantly in or out.
This is agnostic to the type of x-axis data - time series or non-time series.

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Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
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Reviewer Checklist

• Changes appear to address issue?
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[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.22%. Comparing base (7347afd) to head (b01ae62).

Files with missing lines	Patch %	Lines
src/plugins/plot/chart/MctChart.vue	46.42%	14 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8332      +/-   ##
==========================================
+ Coverage   56.14%   57.22%   +1.08%     
==========================================
  Files         728      728              
  Lines       29728    29755      +27     
  Branches     2812     2820       +8     
==========================================
+ Hits        16690    17027     +337     
+ Misses      12698    12387     -311     
- Partials      340      341       +1     

Flag	Coverage Δ
e2e-ci	64.61% <100.00%> (+3.14%)	⬆️
e2e-full	39.46% <50.00%> (-0.02%)	⬇️
unit	46.32% <46.66%> (-0.01%)	⬇️

Files with missing lines	Coverage Δ
src/plugins/plot/chart/MCTChartAlarmPointSet.js	100.00% <100.00%> (ø)
src/plugins/plot/chart/MCTChartSeriesElement.js	94.91% <ø> (ø)
src/plugins/plot/chart/MctChart.vue	48.28% <46.42%> (-0.45%)	⬇️

... and 38 files with indirect coverage changes

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[jvigliotta]

I have one change request about the order we call drawAPI.setDimensions and checkAndApplyReanchor in updateViewport. If it's called after a threshold breach, setDimensions would be using a stale anchorX value.