Remove full-node-capable node allocator

[losipiuk]

Description

Full-node-capable node allocator was an intermediate step
towards bin-packing one. No longer needed.

Is this change a fix, improvement, new feature, refactoring, or other?

cleanup (removal of obsolete feature)

Is this a change to the core query engine, a connector, client library, or the SPI interfaces? (be specific)

core

How would you describe this change to a non-technical end user or system administrator?

N/A

Documentation

(x) No documentation is needed.
( ) Sufficient documentation is included in this PR.
( ) Documentation PR is available with #prnumber.
( ) Documentation issue #issuenumber is filed, and can be handled later.

Release notes

(x) No release notes entries required.
( ) Release notes entries required with the following suggested text:

# Section
* Fix some things. ({issue}`issuenumber`)