feat: Allow `Decimal * Interval` expression planning #932

Job	Run time
Lint	35s
Build Libraries on AMD64 Rust nightly-2022-03-22	10m 45s
Test on windows-latest Rust nightly-2022-03-22	9m 41s
Test on macos-latest Rust nightly-2022-03-22	10m 9s
Integration Test	4m 57s
Test Hash Collisions on AMD64 Rust nightly-2022-03-22	7m 3s
Test Workspace on AMD64 Rust nightly-2022-03-22	4m 7s
Clippy (amd64, nightly-2022-03-22)	5m 17s
	52m 34s

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