Make OptimizerConfig a builder style API

[alamb]

Which issue does this PR close?

re #3524

Rationale for this change

I am preparing to improve the API between the optimizer and the rest of the system and I want to get the basic pattern established before more major changes

What changes are included in this PR?

This PR moves from modifying public fields to a builder interface for OptimizerConfig

Are there any user-facing changes?

To set execution start time, must use builder interface now

[codecov-commenter]

Codecov Report

Merging #3525 (543f8c2) into master (12f047e) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3525      +/-   ##
==========================================
- Coverage   85.77%   85.76%   -0.01%     
==========================================
  Files         299      299              
  Lines       55334    55336       +2     
==========================================
- Hits        47460    47459       -1     
- Misses       7874     7877       +3     

Impacted Files	Coverage Δ
datafusion/core/src/execution/context.rs	79.29% <100.00%> (-0.03%)	⬇️
datafusion/optimizer/src/optimizer.rs	91.66% <100.00%> (+0.75%)	⬆️
datafusion/optimizer/src/simplify_expressions.rs	82.80% <100.00%> (-0.04%)	⬇️
datafusion/optimizer/src/type_coercion.rs	93.56% <100.00%> (ø)
datafusion/expr/src/window_frame.rs	92.43% <0.00%> (-0.85%)	⬇️
datafusion/expr/src/logical_plan/plan.rs	77.68% <0.00%> (-0.34%)	⬇️

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[andygrove]

LGTM

[ursabot]

Benchmark runs are scheduled for baseline = 86a8236 and contender = 9b22100. 9b22100 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java