Discard attribute typed arrays for buffered geometries that are not modified after initial rendering (#9512)

* add setDiscardBuffer method to BufferGeometry

* added discard support to BufferAttribute

* add mechanism for discard of BufferAttribute TypedArrays

* use more elegant method for creating dummy typed array.

* fix typo

* Update BufferGeometry.js

fix brain fade

* rework to use callbacks (phase 1)

* rework part 2

* remove build file

* support setting onUploadCallback from Geometry

* remove repeated calculation from renderer

* remove now redundant getter

* remove geoemtry interface

* document discard mechanism.

* merge fixes

* restore return.this

* drop unneeded call()

* rename discard() method to disposeArray()

* save typed array info in attribute properties

* use saved attribute properties

* remove unused variable

* Add setOverrideMimeType() to XHRLoader

* Rename setOverrideMimeType with setMimeType of FileLoader

* ShapeBufferGeometry: Initial commit

* ShapeBufferGeometry: Clean up

* remove testLightInRange, not equivalent to calcLightAttenuation.

* convert vec3( 0.0, 0.0, 0.0 ) -> vec3( 0.0 ), smaller, equivalent.

* fix merge issue in SpotLight glsl code.

Fix broken references to THREE namespace in geometries.

* Fix Matix4 applyToBuffer

`BufferAttribute.setXYZ` was missing `index` argument.

* Fix Matrix3 applyToBuffer

* provide a means of copying the full buffer instead of just sub ranges

* use new API with setArray and needsFullBuffer

* rebuild full buffer contents when version is zero, set version to zero when array changes

* remove fullBuffer parameter from interleaved attrib

* revert comment to original

* revert earlier changes and just stick to bufferData for all non dynamic geometry

* remove spacing to clean up PR

* ConeGeometry: Clean up

* ConeBufferGeometry: Added missing parameter

* ConeBufferGeometry: Fixed comment

* Added computeFlatVertexNormals()

* Compute face normals only when necessary

* Add material option

* Local clipIntersection

* Updated Docs

* improving global/local clipping interaction

* intersection parameter update

* intersection shader fix

* removed commented code

* remove comment

* Moved FrenetFrames calculation from TubeBufferGeometry to Curve

* Curve: Clean up

* ExtrudeGeometry: Removed reference to TubeGeometry

- Thanks @Mugen87!

* TubeBufferGeometry: Initial Commit

* TubeBufferGeometry: Cleanup

* webgl_geometry_extrude_splines: cleanup

* TubeBufferGeometry: Changed FrenetFrames to private function

* TubeBufferGeometry: Changed FrenetFrames function call