Move data-access crate into datafusion directory

[andygrove]

Which issue does this PR close?

Closes #2424

Rationale for this change

Make the project more consistent. All of the other datafusion sub-crates are under the datafusion directory and there appears to be no reason for data-access to be different.

What changes are included in this PR?

• Move data-access crate into datafusion directory
• Bump data-access version from 1.0.0 to 7.0.0 for consistency with other crates
• Update release scripts

Are there any user-facing changes?

No

[jychen7]

nice, LGTM

[yahoNanJing]

Hi @andygrove, according to #2076, the reason to move the data-access crate out of the datafusion directory is to make it possible for other crates, like datafusion-objectstore-s3 and datafusion-objectstore-hdfs, to depend on only this crate rather than the whole datafusion crate. Then the datafusion crate may also be able to depend on the object store extensions.

In summary, the data-access crate should not depend on the datafusion. The dependencies should be like follows:

datafusion
     |        \
     |          \
     |            datafusion-objectstore-extensions
     |            /
     |          /
data-access

In the future, it's better for the data-access crate to act as an independent crate. Therefore, it's better not to move it to the datafusion directory.

[jychen7]

it looks like this PR just change the data-access code location (for easier crate building). So it doesn't change dependencies

[andygrove]

it looks like this PR just change the data-access code location (for easier crate building). So it doesn't change dependencies

Yes, that is correct. This PR just moves the code and bumps the version from 1.0.0 to 7.0.0 for consistency with other DataFusion crates.

[andygrove]

Thanks for the review @yjshen