Create exportAs aliasing for all Components/Directives to allow for template referencing

[josephperrott]

This issue is meant to track which @Components and @Directives include exportAsaliases:

• MatAutocomplete
• MatButton
• MatAnchor
• MatButtonToggleGroup
• MatButtonToggle
• MatCard
• MatChip
• MatChipList
• MatDatepicker
• MatDatepickerInput
• MatAccordion
• MatExpansionPanel
• MatFormField
• MatGridList
• MatGridTile
• MatIcon
• MatInput
• MatTextareaAutosize
• MatList
• MatListItem
• MatMenuItem
• MatMenu
• MatMenuTrigger
• MatSelect
• MatPaginator
• MatProgressBar
• MatProgressSpinner
• MatRadioGroup
• MatRadioButton
• MatHorizontalStepper
• MatVerticalStepper
• MatStep
• MatTable
• MatRow
• MatHeaderRow
• MatTab
• MatTabGroup
• MatToolbar
• MatToolbarRow
• MatTooltip

[crisbeto]

While we're at it, we should add it to the validate-decorators tslint rule to make sure that we don't forget about it.

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