Fix: support stdin and url for vela ql

[wonderflow]

Signed-off-by: Jianbo Sun jianbo.sjb@alibaba-inc.com

Description of your changes

It supports this kind of usage:

cat <<EOF | vela ql -f -
import (
        "vela/ql"
)
configmap: ql.#Read & {
        value: {
                kind:       "Secret"
                apiVersion: "v1"
                metadata: {
                        name:      "outputs-ecs"
                        namespace: "default"
                }
        }
}
status: configmap.value.data["this_public_ip"]
EOF

And read from URL.

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Merging #4274 (235a447) into master (3709400) will decrease coverage by 0.12%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #4274      +/-   ##
==========================================
- Coverage   60.61%   60.48%   -0.13%     
==========================================
  Files         341      341              
  Lines       33110    33110              
==========================================
- Hits        20069    20028      -41     
- Misses      10407    10444      +37     
- Partials     2634     2638       +4     

Flag	Coverage Δ
apiserver-unittests	33.59% <0.00%> (-0.78%)	⬇️
core-unittests	55.45% <0.00%> (-0.06%)	⬇️
e2e-multicluster-test	20.38% <0.00%> (-0.04%)	⬇️
e2e-rollout-tests	22.35% <ø> (-0.01%)	⬇️
e2etests	29.31% <ø> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/velaql/parse.go	65.67% <0.00%> (ø)
pkg/addon/registry.go	37.34% <0.00%> (-15.67%)	⬇️
pkg/workflow/hooks/data_passing.go	29.41% <0.00%> (-11.77%)	⬇️
...tepdefinition/workflowstepdefinition_controller.go	63.82% <0.00%> (-7.45%)	⬇️
...es/policydefinition/policydefinition_controller.go	64.21% <0.00%> (-7.37%)	⬇️
pkg/apiserver/interfaces/api/oam_application.go	63.07% <0.00%> (-6.16%)	⬇️
.../manualscalertrait/manualscalertrait_controller.go	67.30% <0.00%> (-5.77%)	⬇️
pkg/apiserver/utils/bcode/bcode.go	50.00% <0.00%> (-2.95%)	⬇️
...dev/v1alpha2/application/application_controller.go	82.82% <0.00%> (-2.46%)	⬇️
pkg/addon/utils.go	72.12% <0.00%> (-0.61%)	⬇️
... and 6 more

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[github-actions]

Successfully created backport PR #4277 for release-1.4.