Change single character keys in snakemake parameter configs to multi-character

[lcoombe]

• For snakemake v8.17.0+, there is an outstanding issue where it will not correctly parse single-character config parameters
• To avoid errors, change single character config parameters in ntroot_run_pipeline.smk to multi-character strings
  • This is under the hood, and does not change the invocation of ntroot for users
• In azure-pipelines.yml, temporarily build ntEdit from source
  • Needed for CI to pass until new ntEdit version is updated in bioconda

[warrenlr]

looks good to me, thanks @lcoombe !