Add argument lifetime to BaseTableExpr's evaluate

[jpschorr]

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[sadderchris]

There's also an implicit lifetime on the Cow as well (the type is actually Cow<'_, Value>). Can you check this doesn't also need to be named?

As a nit: you may want to throw #![warn(rust_2018_idioms)] or even #![deny(rust_2018_idioms)] at the top of your crates' lib.rs to enforce that lifetimes always get written out (unless you feel really strongly about the added verbosity - IMO the benefits of this lint outweigh the downsides). It's easy to forget about implicit lifetimes otherwise.

[github-actions]

Conformance comparison report

	Base (1d5bd99)	91b7325	+/-
% Passing	90.35%	90.35%	0.00%
✅ Passing	5731	5731	0
❌ Failing	612	612	0
🔶 Ignored	0	0	0
Total Tests	6343	6343	0

Number passing in both: 5731

Number failing in both: 612

Number passing in Base (1d5bd99) but now fail: 0

Number failing in Base (1d5bd99) but now pass: 0

[codecov]

Codecov Report

❌ Patch coverage is 88.23529% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.25%. Comparing base (4d9ae54) to head (6dc377d).
⚠️ Report is 99 commits behind head on main.

Files with missing lines	Patch %	Lines
partiql-eval/src/eval/mod.rs	80.00%	1 Missing and 1 partial ⚠️
partiql-eval/src/error.rs	75.00%	1 Missing ⚠️
partiql-eval/src/plan.rs	90.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
+ Coverage   79.21%   79.25%   +0.04%     
==========================================
  Files          66       66              
  Lines       17721    17738      +17     
  Branches    17721    17738      +17     
==========================================
+ Hits        14037    14058      +21     
+ Misses       3116     3111       -5     
- Partials      568      569       +1     

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