[dashboards formula and functions] Rename objects for formula and functions to be more generic

[api-clients-generation-pipeline]

See DataDog/datadog-api-spec#834

[nmuesch]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #670 (ab04cfa) into master (a891980) will decrease coverage by 0.34%.
The diff coverage is 0.00%.

Impacted Files	Coverage Δ	Complexity Δ
.../model/FormulaAndFunctionEventQueryDefinition.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...FormulaAndFunctionEventQueryDefinitionCompute.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
.../FormulaAndFunctionEventQueryDefinitionSearch.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ent/model/FormulaAndFunctionEventQueryGroupBy.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...model/FormulaAndFunctionEventQueryGroupBySort.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...model/FormulaAndFunctionMetricQueryDefinition.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...odel/FormulaAndFunctionProcessQueryDefinition.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...lient/model/FormulaAndFunctionQueryDefinition.java	4.04% <0.00%> (ø)	0.00 <0.00> (ø)
...v1/client/model/SyntheticsBrowserVariableType.java	0.00% <0.00%> (-73.34%)	0.00% <0.00%> (-4.00%)
.../v1/client/model/SyntheticsConfigVariableType.java	0.00% <0.00%> (-54.55%)	0.00% <0.00%> (-3.00%)
... and 20 more