[Minor] Improve Schema metadata mismatch error

[alamb]

Which issue does this PR close?

N/A

Rationale for this change

See apache/datafusion#2982

The error just says "schema metadata mismatch" but does not explain what is mismatched.

What changes are included in this PR?

Add details to the error message, and PR just makes the error clearer and explains what is conflicting about the schema

Are there any user-facing changes?

Better error message

[codecov-commenter]

Codecov Report

Merging #2238 (5ac3bea) into master (f41fb1c) will increase coverage by 0.00%.
The diff coverage is 70.00%.

@@           Coverage Diff           @@
##           master    #2238   +/-   ##
=======================================
  Coverage   82.30%   82.30%           
=======================================
  Files         241      241           
  Lines       62437    62441    +4     
=======================================
+ Hits        51389    51393    +4     
  Misses      11048    11048           

Impacted Files	Coverage Δ
arrow/src/datatypes/schema.rs	69.41% <25.00%> (-1.01%)	⬇️
arrow/src/datatypes/mod.rs	99.25% <100.00%> (+<0.01%)	⬆️
...row/src/array/builder/string_dictionary_builder.rs	90.64% <0.00%> (-0.72%)	⬇️
parquet_derive/src/parquet_field.rs	65.75% <0.00%> (-0.23%)	⬇️
...rquet/src/arrow/record_reader/definition_levels.rs	89.02% <0.00%> (+1.68%)	⬆️

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[ursabot]

Benchmark runs are scheduled for baseline = 577a93b and contender = b826162. b826162 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-rs-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-rs-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-rs-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