Support parsing of Hex strings with odd length

See also #6230

Hi everyone,

I ran into the following condition with BYTES-typed columns:

`SELECT * FROM mytable WHERE my_bytes_column = '146'`

'146' is a valid hex string, but errors out. '0146' works.

While seems to be a matter of taste, it may be worthwhile to support odd length hex strings to provide a slightly more intuitive experience.

Addendum - Exception:

> [
> {
> "errorCode": 200,
> "message": "QueryExecutionError:\norg.apache.pinot.core.query.exception.BadQueryRequestException: Cannot convert value: '146' to type: BYTES\n\tat org.apache.pinot.core.query.pruner.ColumnValueSegmentPruner.convertValue(ColumnValueSegmentPruner.java:261)\n\tat org.apache.pinot.core.query.pruner.ColumnValueSegmentPruner.pruneEqPredicate(ColumnValueSegmentPruner.java:129)\n\tat org.apache.pinot.core.query.pruner.ColumnValueSegmentPruner.pruneSegment(ColumnValueSegmentPruner.java:103)\n\tat org.apache.pinot.core.query.pruner.ColumnValueSegmentPruner.prune(ColumnValueSegmentPruner.java:76)\n\tat org.apache.pinot.core.query.pruner.SegmentPruner.prune(SegmentPruner.java:50)\n\tat org.apache.pinot.core.query.pruner.SegmentPrunerService.prune(SegmentPrunerService.java:56)\n\tat org.apache.pinot.core.query.executor.ServerQueryExecutorV1Impl.processQuery(ServerQueryExecutorV1Impl.java:206)\n\tat org.apache.pinot.core.query.executor.QueryExecutor.processQuery(QueryExecutor.java:60)\n\tat org.apache.pinot.core.query.scheduler.QueryScheduler.processQueryAndSerialize(QueryScheduler.java:155)\n\tat org.apache.pinot.core.query.scheduler.QueryScheduler.lambda$createQueryFutureTask$0(QueryScheduler.java:139)\n\tat java.util.concurrent.FutureTask.run(FutureTask.java:266)\n\tat java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)\n\tat shaded.com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:111)\n\tat shaded.com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:58)"
> }
> ]