Unify storage_options, URI params, and ObjectStoreParams

[wjones127]

Right now, most options can be passed in either environment variables or storage_options argument. But there's some like ddbTableName that are passed down as URI parameters:

lance/docs/read_and_write.rst

Lines 715 to 717 in 63227f4

	# s3+ddb:// URL scheme let's lance know that you want to
	# use DynamoDB for writing to S3 concurrently
	ds = lance.dataset("s3+ddb://my-bucket/mydataset?ddbTableName=mytable")

To unify these, we could make the ddbTableName and related options available as storage_options. Then we could make all query parameters in URIs parsed as storage options. That would make the following two equivalent:

lance.dataset("s3://my-bucket/my-table", storage_options={"ddbCommitLock": "true", "ddbTableName": "myDdbTable"})

lance.dataset("s3://my-bucket/my-table?ddbCommitLock=true&ddbTableName=myDdbTable")

As part of this, we could simplify things by deprecating the s3+ddb scheme in favor of simply ddb.