Switch 'kubectl cost predict' to use /prediction/speccost

[michaelmdresser]

DO NOT RELEASE UNTIL v1.101 IS RELEASED

What does this PR change?

See release note.

I apologize to reviewers for the intense refactoring. Display options are now substantially clearer as a nice side effect, e.g. Allocation options no longer pollute Asset commands.

How does this PR impact users? (This is the kind of thing that goes in release notes!)

• Changed kubectl cost predict to use the new /prediction/speccost API introduced in https://github.com/kubecost/kubecost-cost-model/pull/1226 and https://github.com/kubecost/kubecost-cost-model/pull/1229. This changes the output format a bit. Diffs now include usage information (if available) by default. See updated kubectl cost predict --help for more information.

How was this PR tested?

→ go run cmd/kubectl-cost/kubectl-cost.go predict -r michaelkc -f ./test/multi.yaml              
+--------------------------------------------+------------+------------+-------------+-------------+
| WORKLOAD                                   | Δ CPU/MO   | Δ MEM/MO   | Δ GPU/MO    | Δ TOTAL/MO  |
+--------------------------------------------+------------+------------+-------------+-------------+
| michaelkc/deployment/nginx-deployment      | 209.47 USD |  18.72 USD |    0.00 USD |  228.18 USD |
| kubecost/deployment/kubecost-cost-analyzer |   0.35 USD |   0.03 USD |    0.00 USD |    0.38 USD |
| michaelkc/deployment/nginx-deployment-2    | 232.74 USD | 109.17 USD | 3467.50 USD | 3809.41 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD |    0.00 USD |    8.76 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD | 2080.50 USD | 2089.26 USD |
+--------------------------------------------+------------+------------+-------------+-------------+
|                                            | 458.85 USD | 129.13 USD | 5548.00 USD | 6135.98 USD |
+--------------------------------------------+------------+------------+-------------+-------------+

→ go run cmd/kubectl-cost/kubectl-cost.go predict -r michaelkc -f ./test/multi.yaml --only-after --only-diff=false
+--------------------------------------------+------------+------------+-------------+-------------+
| WORKLOAD                                   | CPU/MO     | MEM/MO     | GPU/MO      | TOTAL/MO    |
+--------------------------------------------+------------+------------+-------------+-------------+
| michaelkc/deployment/nginx-deployment      | 209.47 USD |  18.72 USD |    0.00 USD |  228.18 USD |
| kubecost/deployment/kubecost-cost-analyzer |   0.35 USD |   0.03 USD |    0.00 USD |    0.38 USD |
| michaelkc/deployment/nginx-deployment-2    | 232.74 USD | 109.17 USD | 3467.50 USD | 3809.41 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD |    0.00 USD |    8.76 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD | 2080.50 USD | 2089.26 USD |
+--------------------------------------------+------------+------------+-------------+-------------+
|                                            | 458.85 USD | 129.13 USD | 5548.00 USD | 6135.98 USD |
+--------------------------------------------+------------+------------+-------------+-------------+

→ go run cmd/kubectl-cost/kubectl-cost.go predict -r michaelkc -f ./test/multi.yaml --only-diff=false 
+--------------------------------------------+------------+------------+-------------+-------------+------------+------------+-------------+-------------+
| WORKLOAD                                   | CPU/MO     | MEM/MO     | GPU/MO      | TOTAL/MO    | Δ CPU/MO   | Δ MEM/MO   | Δ GPU/MO    | Δ TOTAL/MO  |
+--------------------------------------------+------------+------------+-------------+-------------+------------+------------+-------------+-------------+
| michaelkc/deployment/nginx-deployment      | 209.47 USD |  18.72 USD |    0.00 USD |  228.18 USD | 209.47 USD |  18.72 USD |    0.00 USD |  228.18 USD |
| kubecost/deployment/kubecost-cost-analyzer |   0.35 USD |   0.03 USD |    0.00 USD |    0.38 USD |   0.35 USD |   0.03 USD |    0.00 USD |    0.38 USD |
| michaelkc/deployment/nginx-deployment-2    | 232.74 USD | 109.17 USD | 3467.50 USD | 3809.41 USD | 232.74 USD | 109.17 USD | 3467.50 USD | 3809.41 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD |    0.00 USD |    8.76 USD |   8.15 USD |   0.61 USD |    0.00 USD |    8.76 USD |
| michaelkc/pod/nginx-pod                    |   8.15 USD |   0.61 USD | 2080.50 USD | 2089.26 USD |   8.15 USD |   0.61 USD | 2080.50 USD | 2089.26 USD |
+--------------------------------------------+------------+------------+-------------+-------------+------------+------------+-------------+-------------+
|                                            | 458.85 USD | 129.13 USD | 5548.00 USD | 6135.98 USD | 458.85 USD | 129.13 USD | 5548.00 USD | 6135.98 USD |
+--------------------------------------------+------------+------------+-------------+-------------+------------+------------+-------------+-------------+

Have you made an update to documentation?

• README
• Retroactively edited our launch blog post with the new output format: https://github.com/kubecost/blog/pull/138