sql: bugfix: return total resource count correctly

[moio]

Problem: when browsing to a paginated list, pagination controls do not appear at the bottom of the page:

Root cause: Steve is returning the total resource count incorrectly (returning the number of returned resources, usually one page size or less, instead of the total count).

Solution: leverage new data returned by lasso with rancher/lasso#83 to return the right number.

Note this PR should be merged together with rancher/lasso#83 or functionality will break.

Result: pagination controls appear and work as expected:

FWIW I have also run the integration tests and they are all green rancher/rancher#46015

Best reviewed commit-by-commit.

Please note this contains commits from #235, disregard the first commit.

Please note this PR should be merged after https://github.com/rancher/lasso/84, and the last TEMP commit should be replaced with a lasso bump. The TEMP commit is there to show that tests pass once both changes are merged.

[moio]

JFYI @richard-cox @brudnak

[MbolotSuse]

LGTM pending the lasso changes to complete the work.

[tomleb]

LGTM, just gotta make sure to update lasso first