Only run integration tests when arrow changes

[alamb]

Which issue does this PR close?

re #2149

Rationale for this change

These actions test the integration of the arrow crate, yet they run on all PRs (including parquet changes and now also object_store changes) and they take significant time (32 minutes), often the longest test in the suite

What changes are included in this PR?

1. Only run this integration if files in arrow or .github change
2. Rename test to be more specific

Are there any user-facing changes?

no

Testing:

• Positive (a change to .github, in this PR): https://github.com/apache/arrow-rs/runs/7483623018?check_suite_focus=true
• Postive (a change to arrow): I need to merge this PR to test
• Negative(a change to parquet): I need to merge this PR to test

[alamb]

renamed this to be more specific

[alamb]

cc @viirya and @tustvold

[codecov-commenter]

Codecov Report

Merging #2152 (9235baf) into master (19a7189) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2152   +/-   ##
=======================================
  Coverage   82.86%   82.86%           
=======================================
  Files         237      237           
  Lines       61296    61296           
=======================================
+ Hits        50792    50793    +1     
+ Misses      10504    10503    -1     

Impacted Files	Coverage Δ
...row/src/array/builder/string_dictionary_builder.rs	90.64% <0.00%> (-0.72%)	⬇️
parquet_derive/src/parquet_field.rs	65.98% <0.00%> (+0.22%)	⬆️
arrow/src/datatypes/datatype.rs	63.00% <0.00%> (+0.31%)	⬆️

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[viirya]

This looks good to me.

[ursabot]

Benchmark runs are scheduled for baseline = aa5c849 and contender = 7746e7d. 7746e7d 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