khmer v3 does not work the same as v2 and is incompatible

[dr-joe-wirth]

primerForge does not work with khmer v3. I do not know what has changed between versions, but it does not generate the same results it used to. khmer v2.1 does work. I have restricted the build to reflect this.

@mencian the recipes for both primerforge 1.5.2-0 and primerforge 1.5.3-0 are broken because of this incompatibility. It passes the bioconda recipe checks, but the unit tests fail.

related to #48898 and #53433

[dr-joe-wirth]

@bioconda-bot please fetch artifacts

[BiocondaBot]

Package(s) built are ready for inspection:

Arch	Package	Zip File / Repodata	CI	Instructions
noarch	primerforge-1.5.3-pyhdfd78af_1.tar.bz2	noarch.zip	GitHub Actions	show You may also use conda to install after downloading and extracting the zip file. conda install -c ./packages <package name>

---

Docker image(s) built:

Package	Tag	CI	Install with docker
primerforge	1.5.3--pyhdfd78af_1	GitHub Actions	show Images are in the linux-64 zip file above.gzip -dc images/primerforge---1.5.3--pyhdfd78af_1.tar.gz | docker load

[dr-joe-wirth]

i am going to run unit tests on this build to ensure it is working. i will review changes once i have confirmed it runs.