ARROW-11088: [Rust][DataFusion] Calculate column indices upfront in hash join

[Dandandan]

As mentioned in #9048 it is wasteful to calculate the column indexes for every batch. In this PR we instead do it only once.

This doesn't seem to have a large impact on performance, as expected, but seems to give a small improvement when using smaller batch sizes.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-11088

[codecov-io]

Codecov Report

Merging #9059 (5b6bf83) into master (cc0ee5e) will decrease coverage by 0.00%.
The diff coverage is 85.71%.

@@ Coverage Diff @@## master #9059 +/- ##
==========================================
- Coverage 82.55% 82.55% -0.01% 
==========================================
Files 203 203 Lines 50043 50054 +11 ==========================================
+ Hits 41313 41322 +9 - Misses 8730 8732 +2 

Impacted Files	Coverage Δ
rust/datafusion/src/physical_plan/hash_join.rs	89.68% <85.71%> (-0.26%)	⬇️

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[Dandandan]

Fixed the linting error in #9061

[Dandandan]

Can be combined in #9070 to reduce nr. of open PRs