Bytes Unit not consistent between query and response

[trevorwhitney]

Describe the bug
A LogQL filter on bytes requires the unit to come directly after the number, without a space. However, a logfmt query for a log line with bytes fields in it is returning the value with a space between the number and unit. Here's an example in the Grafana Ops env, for those with access, and a screenshot for those without:

To Reproduce
Steps to reproduce the behavior:

1. Query a stream, using a formatter, with bytes fields
2. See the results have spaces in the values
3. Try to query with spaces in the values

Expected behavior
The format should be consistent between queries and responses

[trevorwhitney]

However we decide to fix this, the way we return these values should also work in how they can be queried, which may be changed in the resolution for #14993