Map Pinot's FLOAT data type to Calcite SQL's REAL type to fix precisi… #194

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Pinot Integration Test Set ${{ matrix.testset }} (${{ matrix.distribution }}-${{ matrix.java }}) with skip bytebuffers:${{ matrix.skip_bytebuffer }}	0s
Pinot Linter Test Set	0s
Pinot Compatibility Regression Testing against ${{ matrix.old_commit }} on ${{ matrix.test_suite }}	0s
Pinot Multi-Stage Query Engine Compatibility Regression Testing against ${{ matrix.old_commit }} on ${{ matrix.test_suite }}	0s
Pinot Unit Test Set ${{ matrix.testset }} (${{ matrix.distribution }}-${{ matrix.java }}) with skip bytebuffers:${{ matrix.skip_bytebuffer }}	0s
Pinot Quickstart on JDK ${{ matrix.java }}-${{ matrix.distribution }} with skip bytebuffers:${{ matrix.skip_bytebuffer }}	0s
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